In a music class I had today, our teacher briefly went over some of the rock styles that started in the late 60's and early 70's. There was Punk, Psychadelic, Jazz-Rock, Metal and... Progressive (or Art rock as she called it). She played one song from each type of rock. The song was supposed to perfectly represent what that style was about. For Punk, she played "God Save the Queen" by the Sex Pistols. Psychadelic- "Purple Rain" by Jimi Hendrix Jazz-Rock- A Blood Sweat and Tears song that I don't recall the name of. Metal- "Paranoid" by Black Sabbath. Then came Progressive Rock. What would she play? Would it be Yes? Would it be King Crimson? No- it was the Moody Blues. I know that they may be progressive rock, but by what terms? She claims that to be progressive is to play straight up rock with an orchestra. Now correct me if I am wrong- but did most Prog. bands use orchestras? I know that some of them did for certain songs, but I know of none that used them all of the time. Also, I believe that people don't use orchestras as much anymore now that keyboards are so advanced. OK, ok, back to the question. What makes Progressive rock? I always believed that it shoudl have at least a few of these: -Long songs Sci-Fi themes Concepts Repeating themes very technical playing orchestrated and or keyboards aplenty. Am I wrong?